Adding device



(No Model.) 2 shamsheetv` C. A. MILLER.

i ADDING DBVIGB. No. 508,435.

Patented Nov. 14, 1893. y

--d-UNITSL--- g4/mnemoc: W57 SM` (No Model.) 2 Sheets-Sheet 2.

C. A. MILLER. ADDING vDmm;

\ No. 508,435. Patented Nov. 14, 1893.

I 7D I l l l UNITED STATES PATENT OEEicE.L

CHARLES A. MILLER, OF UTICA, NEW YORK.

ADDING DEVICE.

SPECIFICATION forming part of Letters `VPatent No.`508,435, dated November 14,1893.

Application filed June 8,1893. Serial No. 476,997. (No model.)

' ing had therein to the accompanying drawings. A

My invention relates to a simple machine or device for use in adding numbers, and consists of a board or plate and a series of disks mounted thereon in such a manner that they may be easily turned, each disk being provided on one face with a series of equi-distant division marks or radial lines, and on its opposite or rear face with a series of numerals running fron O to 9 and a second series of numerals running from l to 9, these numerals being spaced so as to be opposite the radial lines or division marks. The board or plate on which the disks are rotatively mounted is provided adjacent to each disk with a segmental series of numerals running from 1 to 9 with a naught at each end of the series,

these numerals and naughts being so placed as to correspond to the spacing of the radial w lines or division marks on the front face of each disk. The board or4 plate is also provided with an opening opposite each disk, these openings being so placed that the figures or numerals on the@ backs of the disks will show through the same. The front face of each disk is divided into two parts indicated by contrasting colorsor shades, one part comprising ten of the spaces or segments into which the disk is divided by the radial lines and the other part comprising nine of such spaces or segments.

In the use of my device the disks are to be moved in one direction when the numerals to be added are represented by the division marks or radial lines in one contrasting portion of the disks, while if the numerals to be added are indicated by the division marks or radial lines bounding or Within the other coi1- trasting portion of a disk the latter is to be moved in the opposite direction, all as will be v hereinafter fully described.

In the drawings Figure l represents a front or face View of my improved adding machine or device. Figs. 2, 3, 4t and 5 are opposite or back views of the same, the disks being in different positionsin each ofsaid views. Fig. 6 is an edge view of my adding device.

A denotes the disk holder which may consist simply of a sheet of stiff card board, a plate of tin, or other sheet metal, or a thin Wooden board, and on said holder the'disks B, O, and D are mounted in such a way that they may be easily turned by the finger of the operator but so that they will be held with sufficient friction as to avoid accidental turning' or displacement thereof. Each of the said disks is dividedinto nineteen equal spaces by a series of nineteen equi-distant division marks or radial lines, and each disk is also divided into'two contrasting sections which for convenience of illustration I have herein shown as being light and dark or shaded, respectively, one of the said sections comprising ten of the segments or spaces formed by the radial lines and the other of said sections comprising nine of said segments or spaces. vThe radial lines or division marks may be of different colors, or may be, alternately, broken and solid lines, as represent-edin the drawings, for the purpose of distinguishment, and the two contrasting sections of the disk may beof diliferent colors, or one may be white and the other shaded or dark, as represented in the drawings. v

On the plate or disk holder A, adjacent to each disk, is' arranged a series of numerals running from l to 9 with a naught at each end of the series, these numerals being so placed that a numeral will be opposite the outer end of each of the radial lines or division marks formed on the disk.

Each of the disks B, O, and D is provided on its back or rear face with two series of numerals one series running from QA .to 9 and the other from 1 to 9, these numerals Ybeing so placed as to correspond with the nineteen radial lines or division marks forinedcpri1 the front face of the disk- The plate orgdi'sk holder A is provided with openingsathrough which the said numerals formed on thebacks of the disks may be seen from the back of the device when the disks are properly placed for this purpose.

The disks B, C, and D areintended, when in the position shown in Fig. 1, and when the adding operation to be hereinafter described is to be performed, to represent units, tens, and hundreds, respectively, and an adding device with three disks, as represented in the drawings, is therefore adapted to add only upto 999, but by providing one additional disk to the right of the series of disks as they are shown in Fig. l the device will be capable of adding up to 9999, and further additional disks may be employed to give the device any desired capabilities as to the numbers to be added upon it.

In the use of my adding device the disks are to be so rotated that their lower parts move to the right when the figure to be added is represented by one of the radial lines or division marks in the light section of the disk, but if the figure to be added is represented by one ot` the radial lines or division marks bounding or within the dark section of the disk the latter is to be moved in the opposite direction or to the left, and when a disk is thus moved in the direction last named 1 will be carried to the next disk to the right. Thus if it be desired to add the numbers 272, 129, and 501, the disks will first be placed as represented in Figs. 1 and 2 with the line on which the 0 is made on the front face of each of the disks, as shown in Fig. 1, opposite the naughts at the right of the segmental series of numerals placed on the plate or disk holder A adjacent to the said disks, the disks, when in this position,havng their dark or shaded sections above and their light or clear sections below, as shown in Fig. l. With the disks thus placed a series of naughts will appear at the openings a so as to be seen from the back of the plate or disk holder A, as shown in Fig. 2 of the drawings.

1n adding the numbers hereinbefore mentioned the operation is commenced by turning the units disk B so that the radial line which, in the position of the said disk shown in Fig. l, points to the figure 2 in the series of figures adjacent to said disk, around to the O at the right of said series of figures. The tens disk is then turned to the right so that the radial line opposite the numeral 7 in the series of numerals on the plate or disk holder comes opposite the 0 at the right of the sexies of numerals adjacent to the tens disk. The hundreds disk is then turned so that the radial line opposite the figure 2 in the series of gures adjacent to said disk is opposite the 0 at the right of the series of figures adjacent to said disk. Vhen the disks have been thus moved, and the disk holder is reversed, as shown in Fig. 3, the number 272 will be read from the back of the disk holder through the openings. In the commencement of the adding of the next number, 129, it will be observed that the line corresponding to the numeral 9 in the series of figures adjacent to the units numeral disk B- is in the dark or shaded section of the said disk and this will denote that the said disk is to be rotated backward or with its lower portion moved toward the left to bring the line opposite the iigure 9 in position to point to the 0 at the left of the series of numerals adjacent to said disk. This turning of the units disk to the left will call for carrying 1 to the tens disk C so that 3 instead of 2 will be added with the tens disk. The radial lines now pointing to the ligure 3 in the series of ligures adjacent to the tens numeral disk C bounds the dark section of. the said disk so that this will indicate that its disk is also to be turned to the left until the said line is brought to point toward the O at the left of the series of figures adjacent to said disk. This turning of the tens disk to the left also calls for carrying l to the hundreds disk and the last named disk is now to be turned so that the radial line pointing to 2 instead of the radial line pointing to 1 is turned to be opposite theO at the left o1 the figures or numerals adjacent to said disk. After the disks have been moved as thus explained the sum of the two numbers will be read from the back of the disk holder as represented in Fig. 4., being 401, and to add the other number, 501, to those already added the operation is continued by turning the units disk B one space to the right, leaving the tens numeral disk C stationary, as the 0 in the number to be added denotes that no movement is to be given to the said tens disk, and "completing the operation by turning the hundreds numeral disk live spaces to the right, when the full sum, 902, of all of the numbers added will appear from the back of the disk holder through the openings a, as represented in Fig. 5 of the d-rawings.

It will be understood that 1 do not limit my invention to the radial lines as division marks, to the particular number of disks herein shown, or to the particular arrangement shown of the light and dark contrasting sections of the said disk; as other division marks than those shown may be employed, or any desired number of adding disks may be used, or the larger section comprising ten of the segments formed by the radial lines may be made dark and the smaller section may be made light, all without departing from the principle of my invention.

IIO

Having thus described my invention, I`

claim and desire to secure by Letters Patent An adding machine or device comprising a plate or holder provided with a series of adding disks the front face of each of which is divided by nineteen equi-distant lines or division marks into nineteen equal segments or spaces and also into two contrasting sections, one section comprising ten of the said segments or spaces, and the other section comprising nine thereof, and each of said disks having upon its back two series of numerals, one series running from 0 to 9 and the other or disk holder being` provided with openings` 5 through which the numerals on the backs of the disks may be read, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES A. MILLER.

Witn esses:

HENRY A. DAVIS, A. J. BAECHLE. 

